RTCPeerConnection API

The RTCPeerConnection API is the heart of the peer-to-peer connection between each of the WebRTC enabled browsers or peers. To create an RTCPeerConnection object, you use the var peerconnection = RTCPeerConnection(configuration); constructor. The configuration variable contains at least one key named iceServers, which is an array of URL objects that contain information about STUN, and possibly TURN servers, used during the finding candidates phase.

The peerconnection object is then used in slightly different ways on each client, depending upon whether you are the caller or the callee.

The caller's flow

Here's a summary of the caller's flow after the peerconnection object is created:

• Register the onicecandidate handler

• Register the onaddstream handler

• Register the message handler

• Use getUserMedia to access the local camera

• The JSEP offer/answer process

Register the onicecandidate handler

First, you register an onicecandidate handler that sends any ICE candidates to the other peer...